These brakes are on my Giant 2001 XTC NRS bike. The rear brake started to loose a significant amount of pressure, and I believe that there is a leak. I would like to rebuild the brake and replace the o-rings but I am not sure which model it is.
looks like the same business as an hfx-9, maybe a mag. See if you can grab a few identifying parts and compare. I think the barrel is a certain size on the nines vs. mags, and the piston is a little different. See if you can figure out what system its similar too, then buy your parts from there.
The calipers look like old MAGs. My buddy has a set and had the same problem a couple of days ago in Downieville. Had them bled and they work fine now...
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